As seen before, nonwoven process is divided into web forming and web bonding.
Formation for this kind of fabrics is done by airlaid or carding. Airlaid is a formation process in which fibers are dispersed by blown air and then collected in conveyor thanks to vacuum system; carding is give direction to the fiber by combing them in a parallel way. For bonding, hot air melt the fibers and leaves them attached to each other; this gives de process its Airthrough name. it is important to know that hot air is pulled by vacuum system from the inner part of the machine; this allow an effective heat distribution through the fibers.
Airthrough fabrics are known for being bulky, soft and breathable.
Figure taken from: THERMAL BONDING OF NONWOVEN FABRICS. Updated: April, 2004 – M. G. Kamath, Atul Dahiya, Raghavendra R. Hegde (Xiao Gao & Hsu-Yeh Huang)
- Geometric design
- Special design
Airthrough raw materials are fibers that melt at low temperatures; these can be bicomponent or single-component. Bicomponent fibers are the ones with better performance since their outside is designed to act as a binder while their core is in charge to add structure and resistance. The fabric tend to be bulky and with high softness.
We can see an example of a bicomponent fiber in the following figure; on it, the outer layer (binder) is made from PE because it has lower melting point than PET.
Figura de: Nanliu Enterprise.
Other types of bicomponent fibers are the following:
|WIDTH||mm||55 - 3000||Width is defined with each customer to calculate loading capacity|
|ROLL DIAMETER||mm||<1100||Below 1000mm the loading capacity is lower|
|CORE INNER DIAMETER||inch||3|
|COLOR||NA||White, green and blue||White, green and blue|
|FINISHING (EMBOSSED, FLAT,..)||different softness levels and different embossed patterns||different softness levels and different embossed patterns|
|PACKING||Cardboard boxes or PE film, according to the needs||Cardboard boxes or PE film, according to the needs|
|AVAILABLE PRODUCTION CAPACTY||TON/MONTH||1200 -1300||MOQ: 1x40hq container.|